Optical Switching Patents (Class 398/45)
  • Patent number: 10298319
    Abstract: It is an object to monitor signal flow (optically switched state) in an optical node without using a monitor light. In each of output ports of the optical node, a part of output signals is turned back, and the output signal light is subjected to intensity modulation or phase modulation, assigned port identification information, and allowed to reverse in the optical node. From an input port corresponding to the reversed output signal, a plurality of signals turned back are output. The plurality of signals are appropriately converted into intensity modulation from phase modulation and separated by a device having a spectroscopic function, and identification information is read out based on an intensity of a signal light for each signal, thereby determining an optically switched state to an output port corresponding to the input port.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: May 21, 2019
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Takayuki Kurosu, Kiyo Ishii, Satoshi Suda, Shu Namiki
  • Patent number: 10284932
    Abstract: Example embodiments of the present invention relate to a software programmable reconfigurable optical add drop multiplexer (ROADM) comprising of a plurality of wavelength switches and a plurality of waveguide switches, wherein when the plurality of waveguide switches are set to a first switch configuration, the software programmable ROADM provides n degrees of an n-degree optical node, and wherein when the waveguide switches are set to a second switch configuration, the software programmable ROADM provides k degrees of an m-degree optical node.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: May 7, 2019
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 10268099
    Abstract: An optical modulator connected to a first optical fiber and a second optical fiber arranged in parallel includes an optical-path changing unit that redirects light emerging from a tip of the first optical fiber toward a tip of the second optical fiber and an optical modulation chip that modulates the light redirected by the optical-path changing unit and outputs a light beam obtained by modulating the light to a tip of the second optical fiber.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Masaharu Doi, Shinji Maruyama, Yoshinobu Kubota
  • Patent number: 10257088
    Abstract: Creation of a virtual overlay for a multipath network with tiered topology is disclosed. A virtual-node module may group network nodes connected within a common tier, which is initially the tier furthest from the core. This module may also group network nodes at a consecutive tier, closer to the core, that connect a pairs of groupings in the common tier by links between the common and consecutive tiers. Groupings with a common network node may be combined and designated as virtual nodes. A virtual-link module may sum bandwidths for network links between virtual-node pairs with nodes in both the common and consecutive tiers. A check module may combine virtual nodes and links and network nodes and links not yet virtualized in a graph, which it may check for a cycle. An iteration module may iterate both tiers toward the core, triggering further grouping, summing, and updating until no loop exists.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: April 9, 2019
    Assignee: ROBIN SYSTEMS, INC.
    Inventor: Rafit Izhak-Ratzin
  • Patent number: 10244296
    Abstract: Techniques for using planar photonic switch fabrics with reduced waveguide crossings are described. In one embodiment, a system is provided that comprises a memory that stores computer-executable components and a processor that executes computer-executable components stored in the memory. In one implementation, the computer-executable components comprise an arrangement component that arranges a first planar switch fabric topology. The computer-executable components further comprise a transformation component that interleaves a plurality of inputs of the first planar switch fabric topology and a plurality of outputs of the first planar switch fabric topology to form a second planar switch fabric topology, the second planar switch fabric topology having a lower number of waveguide crossings than the first planar switch fabric topology.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 26, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nicolas Dupuis, Benjamin Lee
  • Patent number: 10243722
    Abstract: Aspects of the present application provide an optical interconnecting network architecture. The architecture involves a central node coupled to multiple access nodes (ANs), in which the central node includes a pair of optical couplers used to combine optical signals received from the ANs and broadcast the combined optical signals to all destination ANs. A coherent detection receiver in each of the ANs receives the combined optical signals and selectively detects a wavelength carrying the optical signal assigned to that AN by tuning a local oscillator (LO) wavelength of the coherent detection receiver.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: March 26, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhiping Jiang
  • Patent number: 10237633
    Abstract: An optical node supporting a modular deployment and upgrade of optical spectrum includes one or more C+L-Band amplifier modules; and a modular base module configured to interface one or more C-Band optical modems; wherein, in an initial deployment configuration, the modular base module provides channelized Amplified Spontaneous Emission (ASE) loading for select channels in the C-Band via a first ASE noise source coupled to a multiplexer for the C-Band, bulk ASE loading over the L-Band via a second ASE noise source coupled to an L-Band output, and an upgrade port for connection to an L-Band upgrade module. The L-Band upgrade module can selectively connect to the upgrade port to provide an L-Band upgrade configuration where the L-Band upgrade module and the modular base module coordinate transition of the bulk ASE loading to L-Band channelized ASE loading via a third ASE noise source.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 19, 2019
    Assignee: Ciena Corporation
    Inventors: Paul Chedore, Jean-Luc Archambault, Balakrishnan Sridhar
  • Patent number: 10231035
    Abstract: In an optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, it is difficult to improve the optical bandwidth utilization efficiency in the optical network as a whole with improving the fault tolerance, therefore, an optical network controller according to an exemplary aspect of the present invention includes an optical path setting means for selecting a plurality of optical node pairs composed of two optical nodes from among a plurality of optical nodes composing the optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, and setting, between each of the plurality of optical node pairs, a plurality of optical paths including a first optical path and a second optical path each of which links the optical node pair through various routes; and an optical band setting means for setting respective optical bands based on optical path length and transmission capacity so that an amount of optical bandwidths of the f
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: March 12, 2019
    Assignee: NEC CORPORATION
    Inventors: Hitoshi Takeshita, Tomoyuki Hino, Akio Tajima
  • Patent number: 10225037
    Abstract: Systems and methods to provide a channelized Optical channel Data Unit flexible (ODUflex) include receiving a signal; multiplexing the signal into a Tributary Slot (TS) of the channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size; and mapping the channelized ODUflex into an Optical channel Transport Unit k/Cn (OTUk/Cn)(k=1, 2, 3, 4), (n=1, 2, 3, . . . ). A network element configured to operate in an OTN network includes one or more ports coupled to switching circuitry, wherein a first port is configured to receive a signal, wherein the switching circuitry is configured to multiplex the signal into a TS of a channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size (rate), and wherein a second port is configured to map the channelized ODUflex into an OTUk/Cn.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: March 5, 2019
    Assignee: Ciena Corporation
    Inventor: Sebastien Gareau
  • Patent number: 10225632
    Abstract: Techniques for using planar photonic switch fabrics with reduced waveguide crossings are described. In one embodiment, a system is provided that comprises a memory that stores computer-executable components and a processor that executes computer-executable components stored in the memory. In one implementation, the computer-executable components comprise an arrangement component that arranges a first planar switch fabric topology. The computer-executable components further comprise a transformation component that interleaves a plurality of inputs of the first planar switch fabric topology and a plurality of outputs of the first planar switch fabric topology to form a second planar switch fabric topology, the second planar switch fabric topology having a lower number of waveguide crossings than the first planar switch fabric topology.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 5, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nicolas Dupuis, Benjamin Lee
  • Patent number: 10223644
    Abstract: A method generates a behavioral model of a data center when a machine learning algorithm is applied. A team of human modelers that partition the data center into a plurality of connected nodes is analyzed by a behavioral model. The behavioral model of the data center detects an anomaly in a system behavior center by recursively applying the behavioral model to each node and simple component. A compressed metric vector for the node is generated by reducing a dimension of an input metric vector. A root cause of a failure caused is determined by the anomaly and an action is automatically recommended to an operator to resolve a problem caused by the failure. The proactively actions are taken to keep the data center in a normal state based on the behavioral model using the machine learning algorithm.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: March 5, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Venkata Ramana Rao Gadde, Rao Cherukuri
  • Patent number: 10218454
    Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: February 26, 2019
    Assignee: Google LLC
    Inventors: Vinayak Dangui, Vijayanand Vusirikala, Matthew Newland
  • Patent number: 10164728
    Abstract: Embodiments of the present invention disclose a method for generic mapping procedure (GMP) mapping, which includes: first the information about a adjusted time slot to be occupied by a second GMP block container is carried in the GMP overhead of a first GMP block container; then, the size of the second GMP block container is adjusted in accordance with the inforamtion; eventually, a client signal is mapped into the adjusted second GMP block container adopting a GMP scheme. This GMP mapping method, when working with a corresponding demapping method, provides lossless mapping and demapping of client signals during the process of bandwidth adjusting.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: December 25, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wei Su, Limin Dong, Chiwu Ding, Junling Xiang
  • Patent number: 10148382
    Abstract: Methods and systems are disclosed including a system comprising a first node, having a first transceiver comprising a first receiver and a first transmitter, comprising a tunable laser, configured to transmit a first optical signal on a first channel and to transmit a second optical signal on a second channel if the first receiver does not detect a third optical signal; a second node having a second transceiver comprising a second receiver and a second transmitter configured to transmit the third optical signal on the first channel if the second receiver detects the second optical signal; and a filter having ports configured to a particular bandwidth and to suppress the first optical signal if the first optical signal is not within the particular bandwidth of the port, and to transmit the second optical signal to the second node if the second optical signal is within the particular bandwidth.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: December 4, 2018
    Assignee: Infinera Corporation
    Inventors: Magnus Olson, Einar In de Betou
  • Patent number: 10135917
    Abstract: A method and system for allocating customers in a network includes (a) in a network having a set of N sites, determining a value of N; (b) determining a number of demand requests to be provisioned in the network; (c) determining a currently available capacity of each site of the set of N sites; (d) determining a number of site failures M to be tolerated; (e) Setting a value for a variable X corresponding to a number of sites equal to M+1 where X?N; (f) identifying a topology Tx comprising X sites; (g) calculating a number of concurrent demand requests to be provisioned on each of the X site; and (h) identifying for the topology Tx a subset Sx of the set of N sites having available capacity to provision the number of demand requests to be provisioned on each site. if X<N, incrementing X by one and repeating steps (f) though (h).
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: November 20, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: David Moshenberg
  • Patent number: 10135560
    Abstract: Example embodiments of the present invention relate to optical wavelength directing devices used to construct compact optical nodes.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: November 20, 2018
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 10110977
    Abstract: A photonic frame switching system may include a main controller and at least one photonic frame wrapper line card. The main controller may determine a point in time at which a photonic frame wrapper line card transmits a photonic frame by allocating a time slot to the photonic frame wrapper line card. When the photonic frame switching system includes a plurality of photonic frame wrapper line cards, points in times at which the plurality of photonic frame wrapper line cards transmits the photonic frames may be synchronized. In particular, when a portion of the plurality of photonic frame wrapper line cards transmit a plurality of photonic frames having different destinations, points in times at which all of the plurality of photonic frame wrapper line cards transmits the photonic frames may be adjusted based on a latency by a destination change.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: October 23, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: YongWook Ra, Yunjoo Kim
  • Patent number: 10088643
    Abstract: Embodiments of the present disclosure include an optical shuffle box. The optical shuffle box may include a set of optical connector ports and a set of optical fiber pigtails. Each optical fiber pigtail may have a first end and a second end. The second end of each optical fiber pigtail may include an optical connector. Each optical connector port may be communicatively coupled to the first end of two or more optical fiber pigtails.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 2, 2018
    Assignee: International Business Machines Corporation
    Inventors: Malcolm S. Allen-Ware, Kevin Clarke, John Considine, Thomas W. Keller, Daniel M. Kuchta, David D. Wright
  • Patent number: 10079641
    Abstract: In systems and methods of transporting data over an optical transport network, a first client signal and a second client signal are received at a network element of the optical transport network, each of the first client signal and the second client signal comprising a header and a data payload. An optical data unit is assembled comprising the first client signal and the second client signal in sequence, and the optical data unit is transmitted over the optical transport network. The first data payload and the second data payload may not be interleaved, and further, the first header and the second header may not be interleaved. The optical data unit can comprise the first client signal and the second client signal in a time sequence.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: September 18, 2018
    Assignee: SPRINT SPECTRUM, L.P.
    Inventor: Walter Chen
  • Patent number: 10075395
    Abstract: A communication method and an optical module are disclosed. In various embodiments the method includes generating, by an optical module, a first packet according to a service packet that passes through the optical module, wherein a source address of the first packet is the same as a source address of the service packet, and wherein a destination address of the first packet is the same as a destination address of the service packet; sending, the first packet in a transmission direction of the service packet; and receiving, a second packet sent by the network device, wherein the second packet indicates that the first transmission path from the optical module to the network device exists, and wherein the second packet instructs the optical module to communicate with a network management system by using the network device and the first transmission path.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: September 11, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Hongming Liu, Jianwu Hao
  • Patent number: 10070207
    Abstract: Technologies for optical communication in a rack cluster in a data center are disclosed. In the illustrative embodiment, a network switch is connected to each of 1,024 sleds by an optical cable that enables communication at a rate of 200 gigabits per second. The optical cable has low loss, allowing for long cable lengths, which in turn allows for connecting to a large number of sleds. The optical cable also has a very high intrinsic bandwidth limit, allowing for the bandwidth to be upgraded without upgrading the optical infrastructure.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: September 4, 2018
    Assignee: Intel Corporation
    Inventors: Matthew J. Adiletta, Aaron Gorius, Myles Wilde, Michael T. Crocker
  • Patent number: 10063313
    Abstract: Systems and methods describe synchronizing optical protection switching with an Optical Protection Switch (OPS) including a splitter on a transmit side to both a first fiber path and a second fiber path and a receive switch and monitoring port on a receive side with the receive switch set to only one of the first fiber path and the second fiber path. A method includes, responsive to detection of a fault on the first fiber path, generating a link Forward Defect Indication (FDI) and transmitting the link FDI over a messaging channel downstream; and utilizing the link FDI to generate an Optical Protection Switch Indicator (OPSI) status used by the OPS to cause a switch of the receive switch to the second fiber path.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: August 28, 2018
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Dave C. Bownass, Darren Hennigar, Vipul Bhatnagar
  • Patent number: 10044462
    Abstract: An exemplary apparatus is provided for an optical node of an optical ring network. The optical node comprises a main branch with a wavelength blocker configured to block at least one wavelength of signals targeted to a particular node and to permit the signals received on the other wavelength channels pass, a reception unit tuned to the at least one wavelength dedicated to signals targeted to the particular node, a first optical coupler configured to transmit the signals received from a previous node of the optical ring network both to the main branch and to the reception unit, a transmission unit configured to transmit signals to a wavelength channel according to their targeted node, and a second optical coupler configured to receive the signals received from the main branch and from the transmission unit and to transmit the received signals toward a next node of the optical ring network.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: August 7, 2018
    Assignee: Alcatel Lucent
    Inventors: Guilhem De Valicourt, Yvan Pointurier
  • Patent number: 10038496
    Abstract: Methods and systems for determining optical network utilization efficiency include generating a random demand set and calculating a demand fill ratio (DFR) based on the random demand set. The random demand set includes network demands for a given optical network topology that provide 100% of the wavelength slots in the optical network topology. The DFR may be calculated using different wavelength assignment algorithms, such as a first fit wavelength assignment algorithm, from the randomly generated demands in the random demand set. The DFR may be calculated without and with wavelength conversion nodes.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: July 31, 2018
    Assignee: Fujitsu Limited
    Inventors: Xi Wang, Inwoong Kim, Qiong Zhang, Paparao Palacharla, Tadashi Ikeuchi
  • Patent number: 10034222
    Abstract: An embodiment method includes receiving service parameters for a service and locating logical network nodes for a service-specific data plane logical topology at respective physical network nodes among a plurality of physical network nodes according to the service parameters, a service-level topology, and a physical infrastructure of the plurality of physical network nodes. The method also includes defining connections among the logical network nodes according to the service parameters, the service-level topology, and the physical infrastructure, and defining respective connections for a plurality of UEs to at least one of the logical network nodes according to the service parameters, the service-level topology, and the physical infrastructure. The method further includes defining respective functionalities for the logical network nodes.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: July 24, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Hang Zhang, Aaron James Callard, Nimal Gamini Senarath, Petar Djukic, Alex Stephenne, Ngoc Dung Dao, Hamidreza Farmanbar, Xu Li, Kaveh Shafiee, Philippe Leroux
  • Patent number: 10020880
    Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: July 10, 2018
    Assignee: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OFNEW YORK
    Inventors: Himanshu Gupta, Navid Hamed Azimi, Samir Ranjan Das, Jon Patrick Longtin, Vyas Sekar, Max S. Curran
  • Patent number: 10003865
    Abstract: A spectral-temporal connector interconnects a large number of nodes in a full-mesh structure. Each node connects to the spectral-temporal connector through a dual link. Signals occupying multiple spectral bands carried by a link from a node are de-multiplexed into separate spectral bands individually directed to different connector modules. Each connector module has a set temporal rotators and a set of spectral multiplexers. A temporal rotator cyclically distributes segments of each signal at each inlet of the rotator to each outlet of the rotator. Each spectral multiplexer combines signals occupying different spectral bands at outlets of the set of temporal rotators onto a respective output link. Several arrangements for time-aligning all the nodes to the connector modules are disclosed.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: June 19, 2018
    Inventor: Maged E. Beshai
  • Patent number: 9980021
    Abstract: A scalable switch fabric using optical interconnects includes one or more line modules each including fabric interface optics supporting a plurality of optical output signals; an optical interconnect optically connected to each of the one or more line modules via the fabric interface optics; and one or more center stage switches, wherein the optical interconnect is adapted to shuffle the plurality of optical output signals from each of the one or more line modules to the one or more center stage switches. The optical interconnect can include two levels of shuffle to distribute each of the plurality of optical signals from each of the fabric interface optics to the one or more center stage switches.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: May 22, 2018
    Assignee: Ciena Corporation
    Inventors: John K. Oltman, Jeffery T. Nichols
  • Patent number: 9973294
    Abstract: A node in an optical network may include a wavelength selective switch (WSS) and a processor. The wavelength selective switch may have a plurality of input ports and a plurality of output ports for routing and/or power-controlling of optical slices. The wavelength selective switch may have a plurality of control passbands, each control passband including a one or more optical slices. The processor may determine a passband group (PBG) having a plurality of PBG passbands, each of the plurality of PBG passbands corresponding to a particular control passband. The PBG may be used to translate control information, notifications, and/or instructions.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: May 15, 2018
    Assignee: Infinera Corporation
    Inventors: Parveen Kumar Gupta, Nikhil Kumar Satyarthi, Omer Faruk Yilmaz
  • Patent number: 9967053
    Abstract: Methods and systems are provided for determining a shortest minimum regeneration path in an optical network. The method includes creating a virtual node at a source node, the source node communicatively coupled to a destination node through a plurality of nodes and links. The method includes traversing the virtual nodes, wherein traversing the virtual nodes comprises selecting an unvisited virtual node at a node; identifying a candidate virtual node from the unvisited virtual node; determining whether the candidate virtual node exceeds a maximum permitted weight; determining whether the candidate virtual node violates a shortest minimum regeneration path condition; and creating the new virtual node from the candidate virtual node if the candidate virtual node does not exceed the maximum permitted weight and if the candidate virtual node does not violate the shortest minimum regeneration path condition.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: May 8, 2018
    Assignee: Fujitsu Limited
    Inventors: Inwoong Kim, Xi Wang, Qiong Zhang, Paparao Palacharla, Tadashi Ikeuchi
  • Patent number: 9923661
    Abstract: Provided are a device unit, a node device, and a method and a system for automatically adjusting a tunnel bandwidth. The device unit includes: a client side element, configured to dynamically adjust The quantity of the first timeslots according to a bandwidth of a received data service before the received data service is mapped to an Optical Channel Data Unit (ODU) tunnel; a line side element, configured to configure, according to the quantity of the first timeslots adjusted by the client side element, The quantity of the second timeslots matched with the first timeslots; a tunnel managing element, configured to adjust, according to the quantity of the first timeslots and the quantity of the second timeslots, the quantity of unblocked ODU tunnels between the client side element and the line side element, wherein unblocked ODU tunnels after the adjustment carry the data service.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: March 20, 2018
    Assignee: ZTE CORPORATION
    Inventors: Wenbin Liu, Xilin Liu
  • Patent number: 9918401
    Abstract: According to some examples, a bay is provided to receive at least a portion of a housing of a removable device, where the bay includes a management controller to communicate a management signal to the removable device received by the bay, and a cooling mechanism to provide airflow to the removable device received by the bay. The removable device may be one that receives an optical cable, receives an electrical cable, converts a first optical signal received through the optical cable to a first electrical signal transmitted through the electrical cable, and converts a second electrical signal received through the electrical cable to a second optical signal transmitted through the optical cable.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 13, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B Leigh, John Norton, Darrel G Gaston, Matthew E Stevens
  • Patent number: 9918148
    Abstract: Systems and methods implemented by an all-optical switch configured to switch signals optically in an optical network include receiving and processing call information from a messaging/signaling session, wherein the call information relates to one or more calls on ports in the all-optical switch; and configuring the ports in the all-optical switch in the network based on the processed call information. The call information can include detection of one of a fault and a lockout on the one or more ports and an indication of faults in the optical network. One of a control plane and an SDN controller can be connected to the all-optical switch via the messaging/signaling session.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 13, 2018
    Assignee: Ciena Corporation
    Inventors: Gerard Leo Swinkels, Darren Hennigar, Choudhury A. Al Sayeed
  • Patent number: 9894015
    Abstract: The communication apparatus includes: a first circuit board unit including, on a front surface of the communication apparatus, a port for transmitting and receiving data to and from the network; a second circuit board unit including a plurality of first connectors connected to at least one of the first circuit board units, a second connector being capable of accommodating at least a bandwidth accommodated by the plurality of first circuit board units, and being connected, via a cable, to the other communication apparatus of a standby system; and a cross bar switch for selectively outputting data to the first connectors or the second connector as a data output destination, and a ventilation control unit for controlling a flow of air flowing between each of the first circuit board unit and the second circuit board unit, and outside of the communication apparatus.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: February 13, 2018
    Assignee: Alaxala Networks Corporation
    Inventor: Junji Baba
  • Patent number: 9891898
    Abstract: A method involves compiling a first amount of high-level programming language code (for example, P4) and a second amount of a low-level programming language code (for example, C) thereby obtaining a first section of native code and a second section of native code. The high-level programming language code at least in part defines how an SDN switch performs matching in a first condition. The low-level programming language code at least in part defines how the SDN switch performs matching in a second condition. The low-level code can be a type of plugin or patch for handling special packets. The sections of native code are loaded into the SDN switch such that a first processor (for example, x86 of the host) executes the first section of native code and such that a second processor (for example, ME of an NFP on the NIC) executes the second section of native code.
    Type: Grant
    Filed: June 4, 2016
    Date of Patent: February 13, 2018
    Assignee: Netronome Systems, Inc.
    Inventor: Johann H. Tonsing
  • Patent number: 9859982
    Abstract: A distributed antenna system includes a headend device for generating a downlink transmission signal by combining a plurality of downlink RF signals in different frequency bands, received from a plurality of base stations, and converting the downlink transmission signal into a downlink optical signal, a main remote device for receiving the downlink optical signal from the headend device, converting the downlink optical signal into the downlink transmission signal, and amplifying the plurality of downlink RF signals included in the downlink transmission signal, and a sub-remote device for receiving the downlink transmission signal distributed from the main remote device, and amplifying the plurality of downlink RF signals included in the received downlink transmission signal.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: January 2, 2018
    Assignee: SOLiD, INC.
    Inventors: Yeongshin Yeo, Hwansun Lee, Youngju You
  • Patent number: 9843391
    Abstract: Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a system comprises a hub and at least one node located remotely from the hub. The hub is coupled to the node by first and second fiber paths, the first fiber path comprising an uplink fiber and a downlink fiber, the second fiber path comprising an uplink fiber and a downlink fiber. The node is coupled to the downlink fibers of the first and second fiber paths via an optical combiner, and is further coupled to the uplink fibers of the first and second fiber paths via an optical splitter. The node further monitors a signal quality of a downlink optical signal and communicates to the hub information indicative of the signal quality. The hub switches communications between the hub and the node from the first to second fiber path based on the information.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: December 12, 2017
    Assignee: CommScope Technologies LLC
    Inventors: John Sabat, Jr., Thomas G. Hebert
  • Patent number: 9831977
    Abstract: Systems and methods for routing wavelengths in an optical network include responsive to a path request for a wavelength or group of wavelengths, determining a path through the optical network; determining a location on the path where wavelength blocking should occur to form a loop-free path in the optical network; and setting the wavelength blocking at the location. The optical network can utilize a broadcast and select architecture and the wavelength blocking is configured to prevent the wavelength or group of wavelengths from looping back on a port where the wavelength or group of wavelengths has already been received on. The optical network can utilize an all-broadcast architecture and the wavelength blocking is configured to prevent multiple paths for the wavelength or group of wavelengths by constraining the wavelength or group of wavelengths to a single path through the optical network.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: November 28, 2017
    Assignee: Ciena Corporation
    Inventors: David Weldon Boertjes, Stephen Daniel Shew
  • Patent number: 9831948
    Abstract: A passive optical network (PON) device and method for optical power measurement along an optical transmission path supporting bidirectional propagation of downstream light and upstream light between two network elements of a PON is provided. The device includes an optical power splitter assembly extracting respective portions of the upstream and downstream light, and an upstream wavelength analyzer determining, from the extracted upstream light, an upstream spectral characteristic of the upstream light. The device also includes a processing unit determining, based on the upstream spectral characteristic, a downstream spectral characteristic of a downstream signal of interest among a plurality of downstream signals of the downstream light, and a downstream filter assembly filtering the extracted downstream light to select a portion of the downstream signal of interest.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: November 28, 2017
    Assignee: EXFO INC.
    Inventors: Bernard Ruchet, Mario L'Heureux, Daniel Gariepy
  • Patent number: 9806909
    Abstract: The present invention discloses a data switching apparatus and system, where the data switching apparatus includes: an optical-to-electrical conversion unit, an identification unit, an electrical switching unit, an electrical-to-optical conversion unit, an optical switching control unit, and an optical switching unit. The optical-to-electrical conversion unit is configured to perform optical-to-electrical conversion on a first optical data packet and an optical label, where the optical label carries switching information of a second optical data packet, and the first optical data packet and the second optical data packet are respectively to-be-switched data packets that need to use electrical packet switching and optical packet switching. The identification unit is configured to identify whether an electrical signal output by the optical-to-electrical conversion unit is from the optical label or the first optical data packet.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: October 31, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yan Wang, Xiaoling Yang, Huixiao Ma
  • Patent number: 9798683
    Abstract: Data storage systems and methods for storing data in computing nodes of a super computer or compute cluster are described herein. The super computer storage may be coupled with a primary storage system. In addition to a CPU and memory, non-volatile memory is included with the computing nodes as local storage. The super computer includes a plurality of computing groups, each including a plurality of computing nodes. There is one burst buffer fabric per group and one input/output node per group. When data bursts occur, data may be stored by a first computing node on the local storage of a second computing node in the computing group through the burst buffer fabric without interrupting the CPU in the second computing node. Further, the local storage of other computing nodes may be used to store redundant copies of data from a first computing node to make the super computer data resilient.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: October 24, 2017
    Assignee: DataDirect Networks, Inc.
    Inventors: Paul Nowoczynski, Michael Vildibill, Jason Cope, Pavan Uppu
  • Patent number: 9768870
    Abstract: A method includes automatically detecting an association between members based on their relationship to one another; sharing topology and cluster information between the members; and determining roles for each member, based on the topology and cluster information and rules, wherein the roles are used to automatically provision at least one resource on each member, without user intervention. A method of configuring network devices sharing a pool of available resources is also described, wherein the network devices have management connectivity between one another through a plurality of point-to-point connections. The method includes, after a point-to-point connection in the management connectivity is formed based on cabling of associated network devices, determining a resource index number for each of the associated network devices; and uniquely assigning the resources from the pool to each of the network devices based on their respective resource index number.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: September 19, 2017
    Assignee: Ciena Corporation
    Inventors: David J. Miedema, Michael Watford, Xiaoqing Hu, Ross Caird, Rodd Lamarche, Zenon Slodki
  • Patent number: 9756405
    Abstract: Systems and methods for controlling an optical switch via one of a control plane and Software Defined Networking (SDN) include associating one or more managed endpoints with one or more line ports of an optical switch; receiving state information for the one or more managed endpoints over a session associated with one of the control plane and the SDN; and controlling switching of the one or more line ports based on the state information for the one or more managed endpoints. The optical switch is an all-optical device which does not have access to digital signal quality information of associated signals.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: September 5, 2017
    Assignee: Ciena Corporation
    Inventors: Gerard Leo Swinkels, Darren Hennigar, Choudhury A. Al Sayeed
  • Patent number: 9742518
    Abstract: A network capable of being used in a datacenter is described. In some embodiments, the network can comprise a set of optical fiber rings, wherein each optical fiber ring carries data traffic on one or more wavelengths, and wherein each optical fiber ring is partitioned into multiple sectors. A reconfigurable optical add-drop multiplexer (ROADM) can be coupled to at least one optical fiber in each of at least two sectors. An electro-optical-switch can be coupled to each ROADM in each of the at least two sectors. A set of switches can be coupled to each electro-optical-switch in each of the at least two sectors. The set of switches can comprise a first layer of aggregation switches that is coupled to a second layer of edge switches, wherein the edge switches can be coupled to servers in a datacenter.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: August 22, 2017
    Assignee: Indian Institute of Technology Bombay
    Inventors: Ashwin Gumaste, Bala Murali Krishna Bheri
  • Patent number: 9729948
    Abstract: Systems and methods for discovery of a controller in an OpenFlow network may include using an OpenFlow capable switch to discover the controller without the help of other components, such as DHCP. The link discovery protocol may be configured on the switch and the discovery process may use an out-of-band or an in-band communication. In one example, a link discovery protocol packet is sent out of all ports of a switch that meet the eligibility criteria. The response is guaranteed because of a TTL like mechanism in the packet. Each port on a switch that receives this link discovery protocol packet takes an action depending on its current state.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: August 8, 2017
    Assignee: Infinera Corporation
    Inventors: Ramesh Subrahmaniam, Madhukar Anand, Balaji Balasubramanian
  • Patent number: 9729261
    Abstract: A transmission apparatus includes: a first mapping unit configured to allocate a first frame that stores a client signal to an intermediate frame; a second mapping unit configured to allocate the intermediate frame to a second frame that has a higher bit rate than a bit rate of the first frame; and a rate controller configured to control a bit rate of the intermediate frame based on the bit rate of the first frame and the bit rate of the second frame.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: August 8, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Wataru Odashima, Hayato Furukawa, Toru Katagiri
  • Patent number: 9722723
    Abstract: The present invention and its embodiments are made to provide for dynamic hitless resizing in optical transport network without any identification of matching time slots by the Network Management System (NMS) or any control plane signaling including Generalised Multi Protocol Label Switching (GMPLS). An aspect of the invention provides for a method of hitless ODUflex connection resizing in an optical transport network by incrementing or decrementing the ODUflex connection between the nodes, based on an indication command given to a source node for bandwidth increase or decrease, by identifying and matching at least one time slot through Link Connection Resizing (LCR) protocol message exchanges. Another aspect of the invention provides for a method of hitless ODUflex connection resizing in an optical transport network by decrementing the matching time slot used for the incrementing operation, in case of unsuccessful incrementing operation between nodes.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: August 1, 2017
    Assignee: TEJAS NETWORKS LTD.
    Inventors: Nishant Sharma, Nikhil Kumar Satyarthi
  • Patent number: 9712273
    Abstract: Optical signals with different orbital angular momentum (OAM) modes are used to multiplex data for different receiver together or a light signal. The OAM based multiplexing may be used in addition to other multiplexing schemes such as time division multiplexing, polarization multiplexing and so on. Capacity of existing optical network infrastructure can be increased significantly using OAM modulation, and data communication can be secured at the same time.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: July 18, 2017
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Yuan Fang
  • Patent number: 9692511
    Abstract: A reconfigurable and redundant electro-optical connector and corresponding method are provided. The connector may include a first plurality of transducers in communication with a first port and a second plurality of transducers in communication with a second port, the first port and the first transducers defining a first channel and the second port and the second transducers defining a second channel. The connector may include a selective combiner to combine the first optical signals and the second optical signals, and a controller in communication with each of the transducers. The controller may transmit at least a first portion of a first datalink on at least the first channel in a first configuration. The controller may redistribute the first portion of the first datalink onto at least the second channel in a second configuration.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: June 27, 2017
    Assignee: Mellanox Technologies, Ltd.
    Inventors: Alon Webman, Evelyn Landman, Eyal Waldman, Elad Mentovich, Sylvie Rockman, Itshak Kalifa, Yaakov Gridish
  • Patent number: 9647792
    Abstract: A spectral-temporal connector interconnects a large number of nodes in a full-mesh structure. Each node connects to the spectral-temporal connector through a dual link. Signals occupying multiple spectral bands carried by a link from a node are de-multiplexed into separate spectral bands individually directed to different connector modules. Each connector module has a set temporal rotators and a set of spectral multiplexers. A temporal rotator cyclically distributes segments of each signal at each inlet of the rotator to each outlet of the rotator. Each spectral multiplexer combines signals occupying different spectral bands at outlets of the set of temporal rotators onto a respective output link. Several arrangements for time-aligning all the nodes to the connector modules are disclosed.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 9, 2017
    Inventor: Maged E. Beshai